CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Consolidated revenue	$ 543.1	$ 612.4
Consolidated expenses:
Compensation and related expenses	228.2	266.7
Selling, general and administrative	95.6	106.4
Intangible amortization and impairments	29.6	23.2
Interest expense	18.2	21.6
Depreciation and other amortization	5.2	5.5
Other expenses (net)	11.0	12.0
Total consolidated expenses	387.8	435.4
Equity method income (loss) (net)	(358.1)	96.3
Investment and other income	8.0	14.2
Income (loss) before income taxes	(194.8)	287.5
Income tax expense (benefit)	(61.8)	63.5
Net income (loss)	(133.0)	224.0
Net income (non-controlling interests)	(67.8)	(71.0)
Net income (loss) (controlling interest)	$ (200.8)	$ 153.0
Average shares outstanding (basic) (in shares)	51.9	54.6
Average shares outstanding (diluted) (in shares)	51.9	57.0
Earnings (loss) per share (basic) (in dollars per share)	$ (3.87)	$ 2.80
Earnings (loss) per share (diluted) (in dollars per share)	$ (3.87)	$ 2.77

The aggregate expense charged against earnings to allocate the cost of tangible assets to periods in which the assets are used and held and to allocate the cost of issuing debt to periods in which the debt is outstanding. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

No definition available.